Peweta 921 Series User manual

Software version V1.07
Master clock/signal master clock
Type series 921
•Instructions for commissioning
•Operating instructions

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Version note................................................................................................................................................ 5
Introduction ................................................................................................................................................ 6
Quartz operation .................................................................................................................................... 6
Radio guidance DCF77.......................................................................................................................... 6
Radio guidance GNSS........................................................................................................................... 6
Synchronisation to an NTP server.......................................................................................................... 6
Power supply - Power failure.................................................................................................................. 6
Protective devices.................................................................................................................................. 7
Slave clock lines .................................................................................................................................... 7
Switching channels ................................................................................................................................ 7
Network interface ................................................................................................................................... 7
Versions - Article numbers - Accessories ................................................................................................ 8
Safety instructions ..................................................................................................................................... 9
Mounting ................................................................................................................................................... 11
Opening the housing............................................................................................................................ 11
Mounting the enclosure on the wall ...................................................................................................... 12
Terminals - Layout in full configuration................................................................................................. 13
Strain relief........................................................................................................................................... 14
Commissioning ........................................................................................................................................ 15
Connect power supply - Switch on master clock .................................................................................. 15
Display test .......................................................................................................................................... 16
Disconnect power supply - Switch off master clock .............................................................................. 17
Device fuse .......................................................................................................................................... 18
Operation - Menu...................................................................................................................................... 19
Menu structure..................................................................................................................................... 19
Function keys....................................................................................................................................... 19
DCF77 radio receiver................................................................................................................................ 20
General................................................................................................................................................ 20
Connection........................................................................................................................................... 21
Mounting and alignment....................................................................................................................... 22
Submaster clock....................................................................................................................................... 23
Synchronisation of a second master clock via DCFport24.................................................................... 23
GNSS radio receiver................................................................................................................................. 24
General................................................................................................................................................ 24
Connection........................................................................................................................................... 24
Mounting and alignment....................................................................................................................... 25
Slave clock lines....................................................................................................................................... 26
Factory settings.................................................................................................................................... 26
Cable lengths....................................................................................................................................... 26
Line type .............................................................................................................................................. 26
Line load .............................................................................................................................................. 27
Connect slave clock lines..................................................................................................................... 27
Wiring diagram..................................................................................................................................... 28
Set slave clocks........................................................................................................................................ 29
Slave clock minute pulse 24 V/12 V ..................................................................................................... 29
Slave clock minute/second pulse 24V/12 V.......................................................................................... 30
Second pulse slave clock 24 V, creeping minute.................................................................................. 31
Slave clock minute pulse 24 V/12 V with synchronous second 230 V/50 Hz ........................................ 32
DCFport24 Telegram Slave Clock........................................................................................................ 32
DCFport24 + Minute Pulse................................................................................................................... 33
Connection of the switching channels ................................................................................................... 34
RS232 data interface ................................................................................................................................ 35
Time protocol via the RS232 data interface.......................................................................................... 35
Alarm contact ........................................................................................................................................... 36
Connection of options 1 and 2 ................................................................................................................ 37
Menu 1 - Master clock .............................................................................................................................. 38
Menu 1.1.............................................................................................................................................. 38
Master clock with system time and date............................................................................................... 38

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Menu 1.2.............................................................................................................................................. 38
Time base............................................................................................................................................ 38
Time base selection ............................................................................................................................. 38
Control of continuous DCF77 radio reception....................................................................................... 38
Control of continuous GNSS radio reception........................................................................................ 39
Control of continuous synchronisation with an NTP server................................................................... 39
Checking the last synchronisation: Date .............................................................................................. 39
Checking the last synchronisation: Time .............................................................................................. 39
Radio reception quality control - DCF77............................................................................................... 40
Radio reception quality control - GNSS................................................................................................ 40
IPV4 Address of the NTP server .......................................................................................................... 40
Menu 1. 3............................................................................................................................................. 41
Setting the time zone ........................................................................................................................... 41
Deposited time zones in menu 1.3 ....................................................................................................... 42
Menu 1. 4............................................................................................................................................. 43
Setting the current time (system time), manually.................................................................................. 43
Menu 1. 5............................................................................................................................................. 43
Setting the current date (system date), manually ................................................................................. 43
Menu 1.6.............................................................................................................................................. 44
Changing the hour display (12/24 hour format) .................................................................................... 44
Menu 1.7.............................................................................................................................................. 44
Changing the date display.................................................................................................................... 44
Menu 2 - Lines .......................................................................................................................................... 45
Menu 2.1.............................................................................................................................................. 45
Current consumption of the slave clock lines ....................................................................................... 45
Menu 2.2.............................................................................................................................................. 45
Switching lines on and off .................................................................................................................... 45
Menu 2.3.............................................................................................................................................. 46
Line time - Slave clock time.................................................................................................................. 46
Menu 2. 4............................................................................................................................................. 46
Time zone for the slave clock lines (world time function)...................................................................... 46
Menu 2. 5............................................................................................................................................. 47
Mode (pulse type) ................................................................................................................................ 47
Menu 2. 6............................................................................................................................................. 48
Enter cycle........................................................................................................................................... 48
Menu 2. 7............................................................................................................................................. 49
Activate power reserve - deactivate ..................................................................................................... 49
Menu 2.8.............................................................................................................................................. 50
Pulse length - Set pulse pause............................................................................................................. 50
Menu 3 - Switching................................................................................................................................... 51
Menu 3.1.............................................................................................................................................. 51
Switching channels Status ................................................................................................................... 51
Menu 3.2.............................................................................................................................................. 52
Switching program input....................................................................................................................... 52
Example 1: Weekly program, "pulse" ................................................................................................... 53
Example 2: Weekly program, "on"........................................................................................................ 54
Example 3: Weekly program, "off ......................................................................................................... 54
Example 4: Yearly program, "on" ......................................................................................................... 55
Example 5: Yearly program, "off" ......................................................................................................... 56
Example 6: yearly program, "lock"........................................................................................................ 57
Example 7: yearly program, "unlock".................................................................................................... 58
Program mode " yearly by list " (variable holidays)............................................................................... 59
Menu 3.2.............................................................................................................................................. 60
Change switch event............................................................................................................................ 60
Menu 3.2.............................................................................................................................................. 61
Delete single switch events.................................................................................................................. 61
Menu 3.3.............................................................................................................................................. 61
Delete all switch events of a channel ................................................................................................... 61

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Menu 3.4.............................................................................................................................................. 62
Manually operating the switching channels .......................................................................................... 62
Menu 4 - Messages................................................................................................................................... 63
Menu 4.1.............................................................................................................................................. 63
Display error messages ....................................................................................................................... 63
Menu 4.2.............................................................................................................................................. 63
Edit error messages............................................................................................................................. 63
Menu 5 - System ....................................................................................................................................... 66
Menu 5.1.............................................................................................................................................. 66
System................................................................................................................................................. 66
Menu 5.2.............................................................................................................................................. 66
Change passcode for keyboard and web interface............................................................................... 66
Unlocking the keyboard........................................................................................................................ 66
Menu 5.3.............................................................................................................................................. 67
Set language........................................................................................................................................ 67
Menu 5.4.............................................................................................................................................. 67
Switch RS232 interface on/off.............................................................................................................. 67
Menu 5.5.............................................................................................................................................. 68
Line voltage 24V / 12V......................................................................................................................... 68
Menu 5.6.............................................................................................................................................. 68
Factory settings.................................................................................................................................... 68
Menu 5.7.............................................................................................................................................. 69
Update ................................................................................................................................................. 69
Menu 6 - Network...................................................................................................................................... 70
Establish network connection............................................................................................................... 70
Menu 6.1.............................................................................................................................................. 70
Network................................................................................................................................................ 70
Menu 6.2.............................................................................................................................................. 71
DHCP .................................................................................................................................................. 71
Menu 6.3.............................................................................................................................................. 71
IPv4 address........................................................................................................................................ 71
Menu 6.4.............................................................................................................................................. 71
Net mask.............................................................................................................................................. 71
Menu 6.5.............................................................................................................................................. 72
Standard Gateway ............................................................................................................................... 72
Menu 6.6.............................................................................................................................................. 72
DNS server .......................................................................................................................................... 72
Menu 6.7.............................................................................................................................................. 72
MAC address ....................................................................................................................................... 72
Menu 7 - NTP client .................................................................................................................................. 73
Menu 8 - NTP server ................................................................................................................................. 74
Web interface............................................................................................................................................ 75
Passcode............................................................................................................................................. 75
Main menu........................................................................................................................................... 76
Master clock menu............................................................................................................................... 77
Lines menu .......................................................................................................................................... 78
Channels menu.................................................................................................................................... 79
Messages menu................................................................................................................................... 80
System menu....................................................................................................................................... 80
Network menu...................................................................................................................................... 81
Network menu - NTP client / NTP server.............................................................................................. 82
Options menu ...................................................................................................................................... 83
Help menu ........................................................................................................................................... 84
Replace power reserve battery................................................................................................................ 85
Technical data .......................................................................................................................................... 86
EC Declaration of Conformity.................................................................................................................. 87
Disposal of old appliances ................................................................................................................... 88

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Version note
These operating instructions/installation instructions describe the master clock type series 921 with
the software version V1.07
•The currently offered operating instructions/installation manual and software
for this master clock can be found at: https://www.peweta.com/download.php
•Check whether a more recent version of the operating/installation instructions is available
for this master clock.
•You can read the software status of your master clock in menu 5.7 (see page 69).
•Download the current software and operating instructions/installation manual from
our homepage and carry out a software update if a more recent version is available (see
page 69).

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Introduction
This master clock provides a time base with synchronisation by various time sources. An integrated quartz
oscillator ensures high accuracy. Optional external time references can be used to correct the integrated
quartz oscillator: A PEWETA DCF77 radio receiving antenna (item no. 03.925.111), a GNSS satellite re-
ceiver (option no. -95) or an NTP server. Summer/winter time changeover or different local times can be
stored for the system time of the master clock as well as for the slave clock lines. The master clock is oper-
ated via the keypad on the master clock or via the network and an Internet browser.
Depending on the equipment version, this master clock can be used to control the following slave clocks or
switch the following devices:
-Slave clocks with network interface NTP (Network Time Protocol)
-NTP clients such as PCs, printers, IP telephones, etc.
-Slave clocks with analogue display, with or without second hand
-Slave clocks with digital display, with or without date
-Self-setting PEWETA DCFport24 telegram slave clocks
-Acoustic signalling devices, lighting devices, etc.
Quartz operation
A temperature-compensated quartz oscillator (TCXO) ensures a master clock rate accuracy of
+/- 0.1 seconds/24 hrs at an ambient temperature of -15 °C to +60 °C.
Radio guidance DCF77
Two cesium fountain clocks of the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig form the
legal time for the Federal Republic of Germany and transmit it via the long-wave transmitter DCF77, near
Frankfurt a.M., on the frequency 77.5 kHz. The detachable PEWETA DCF77 radio receiving antenna (acces-
sory) receives this legal time and synchronises the master clock. The CSF2 and CSF1 cesium fountain
clocks have a rate deviation of 6 billionths of a second per year relative to an ideal clock. Through permanent
synchronisation to the cesium fountain clocks, the PEWETA master clock takes over their long-term stability.
The short-term stability is 30 milliseconds per second.
Radio guidance GNSS
The remote PEWETA GNSS radio receiver receives the time from satellites of the Global Navigation Satellite
System (GNSS). GPS (NAVISTAR GPS/USA), GLONASS (Russian Federation), Galileo (Europe) and Bei-
dou (People's Republic of China) satellites are received. The remote
PEWETA GNSS radio receiver (option) ensures high short- and long-term stability.
Synchronisation to an NTP server
The master clock has an Ethernet network interface. Via this interface, the master clock can take over the
time of an NTP server. The function "NTP client for synchronising the system time via LAN" is an option (op-
tion no. -98) and can be ordered additionally, the Ethernet network interface itself is always included in the
scope of delivery of the master clock.
Power supply - Power failure
The PEWETA master clock is supplied with power via 100-240 VAC/50-60 Hz (observe type plate). If in-
cluded in the scope of delivery, a power reserve accumulator 12 VDC/1500 mA maintains all functions of the
master clock for a limited period of time in case of power failure.

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Protective devices
The power supply input 100-240 VAC/50-60 Hz is protected by a fuse.
The fuse may only be replaced by a qualified electrician.
The slave clock lines are protected against short circuit and overload.
Slave clock lines
The master clock has up to 4 slave clock lines when fully extended. The total current consumption of all lines
is
1,000 mA at 24 V (1,000 mA at 12 V), the distribution to the slave clock lines is arbitrary. The line voltage for
supplying the slave clocks is either 24 V or 12 V. The slave clock lines should be operated at 24 V as stand-
ard. The following pulse types can be selected for each line:
-Minute pulse (factory setting).
-Second pulse, second pulse with creeping minute.
-Half-minute pulse.
-PEWETA DCFport24 telegram.
-PEWETA DCFport24 telegram combined with minute pulse.
The total current consumption of all lines for the operating mode second pulse is max. 500 mA (in 24 V oper-
ation), for the operating mode PEWETA DCFport24 telegram max. 500 mA (in 24 V operation).
Switching channels
For switching acoustic and/or optical break signalling devices or for switching on/off other devices, e.g. light-
ing equipment, fans, etc., up to
to 4 signal circuits (potential-free relay contact 250 V/2A) with weekly programs, annual programs and holi-
day programs are available. The switching channels are bistable relays with changeover contact (max. 300
switching events). Manual operation of the switching channels is possible. The supply voltage for the signal-
ling devices to be switched must be provided by the customer.
Network interface
The master clock has an RJ45 Ethernet IEEE 802.3 10/100Base-T network interface for integration into a
network/LAN.
The network interface enables:
-Operation of all functions via an internet browser from a PC, mobile phone or tablet
-NTP Server (option). Synchronises NTP clients such as NTP clocks, PCs, printers, etc.
-Synchronisation to an NTP time server (option, instead of DCF77 or GNSS radio receiver)
-Sending status and error messages via SYSLOG or e-mail

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Versions - Article numbers - Accessories
Version
PEWETA
Article number
Slave clock line(s) Switching channels Power reserve battery
10.921.010 1 0 no
10.921.110 1 0 yes
10.921.012 1 2 no
10.921.112 1 2 yes
10.921.020 2 0 no
10.921.120 2 0 yes
10.921.022 2 2 no
10.921.122 2 2 yes
10.921.024 2 4 no
10.921.124 2 4 yes
10.921.040 4 0 no
10.921.140 4 0 yes
10.921.044 4 4 no
10.921.144 4 4 yes
Accessories
PEWETA
Article number
03.925.111 DCF77 radio receiver (IP68)
Options
PEWETA
Option no.
-95 GNSS version, incl. GNSS antenna (IP 68)
-98 NTP Client
-99 NTP Server

- 9 -
Safety instructions
•Before carrying out any electrical work, the master clock must be disconnected from the power supply (all
poles) and secured against being switched on again.
The absence of voltage must be determined.
Failure to do so may result in damage to property and personal injury or even danger to life.
•The master clock may only be installed and opened for maintenance purposes by a qualified electrician.
Unauthorised opening and improper tampering may result in considerable danger to the user.
•The master clock has been developed and tested in accordance with the requirements of EN 62368-1
(2014 +AC:2015 + A11:2017 / Equipment for audio/video, information and communication technology).
•It must be possible to disconnect the master clock from the mains. An all-pole disconnector with at least 3
mm contact opening must be present in the installation. Examples of an all-pole disconnector are a plug
with a protective contact system or a circuit breaker. The all-pole disconnector must still be accessible af-
ter installation. It must be possible to assign the all-pole disconnector to the master clock with a label.
•To disconnect the master clock from the power supply, it must first be disconnected from the power supply
via the all-pole disconnector. After that, the master clock must be switched off via the operating switch
(see page 17) to deactivate the battery, if present.
•The unit is intended exclusively for the control of slave clocks, for the switching of signalling and
switching devices and network services that must not perform any safety functions.
•Power is supplied via an AC voltage of 100-240 VAC/50-60 Hz (observe the rating plate).
•The connection cable used for the mains voltage must have a minimum cross-section of 1.5 mm² and
must be made of solid rigid material.
•Building-side installation according to VDE 0100 or corresponding national or international regulations ac-
cording to DIN, ISO, EN etc. must be observed and complied with.
•Do not connect or disconnect any cables during a thunderstorm/lightning.
•The battery and the rechargeable battery may only be replaced by a PEWETA original replacement bat-
tery and PEWETA original replacement rechargeable battery of the same type. Otherwise, functional im-
pairments may result and all supplier responsibilities will lapse.
•Batteries and rechargeable batteries must be kept away from fire, danger of explosion!
•Batteries and rechargeable batteries must not be opened or damaged. The electrolyte liquid released is
toxic and can cause burns to the skin and eyes.
•Rechargeable batteries can cause injuries due to electric shocks and high short-circuit currents.
When handling batteries, observe the following safety precautions:
- Take off wristwatches, rings and other metal objects.
- Use tools with insulated handles.
•Do not short-circuit the terminals of the battery.
•The batteries must be disposed of as special waste, they must not be disposed of with household waste.

- 10 -
•Rechargeable batteries/batteries can be returned free of charge after use to the point of sale or to appro-
priately marked collection points.
•The end user is legally obliged to return used batteries/rechargeable batteries.
•The master clock must be mounted on a vertical, stable, smooth (wall) surface.
No vibrations may be transmitted to the master clock.
•When mounting the master clock on a conductive surface, ensure a distance of 20 mm between the bot-
tom of the master clock and the conductive surface.
The distance must be non-conductive spacers to ensure that the distance is permanent.
•The master clock must not be exposed to direct sunlight.
•The limit values for temperature (0°-40°C) and humidity (10-90% rel. humidity, non-condensing) must not
be exceeded.
•The mounting location of the master clock must be chosen in such a way that the ingress of dust and liq-
uids is excluded. Electromagnetic sources of interference (e.g. motors, electromagnets, ballast chokes,
etc.) must be avoided.
•The master clock is not approved for EX areas.

- 11 -
Mounting
Opening the housing
1. Loosen the screws of the terminal strip cover and remove the cover.
2. Use a wide, narrow flat-blade screwdriver to prise open the front of the housing in the gap and
Swivel the front of the housing to the left.
Gap to prise open the front of the housing
Terminal strip cover screws
1.1}>master clock
23:45:59 Su27.03.22

- 12 -
Mounting the enclosure on the wall
Attach the master clock to the wall using the 4 screws and dowels included in the delivery.
on the wall using the 4 screws and dowels provided, see illustration:
Included in delivery: 4 x dowels
4 x screw 4 x 40 mm
Holes for mounting screws
Ø 4,2 x 7,1 mm

- 13 -
Terminals - Layout in full configuration
1. Operating switch: OFF (left) / ON (right)
2. Mains fuse: Fine-wire fuse (5 x 20 mm) 250 V/500 mA slow-blow
3. Power supply 100-240 VAC/50-60 Hz (observe type plate)
4-7. Switching channels 0 to 4, depending on the master clock version
8. RJ45 Ethernet IEEE 802.3 10/100Base-T
9. DCF77 antenna input
10. RS232 interface
11-14. slave clock lines 1 to 4, depending on the version of the master clock.
15. Strain relief
16. Output for option slot 1 (option)
17. Output for option slot 2 (option)
18. Reset button
19. Slot 1 for option card
20. Slot 2 for option card
21. Jumper for DCF77 antenna with external supply voltage
22. Keyboard connection socket
23. LCD connection socket
24. Power reserve accumulator (option)
25. Alarm contact (option)
26. USB 2.0 / Type A interface

- 14 -
Strain relief
All connected cables must be secured against tension and shear with 2 cable ties each.
The cable ties must be tightened firmly. The position of the cable ties is shown in the
following illustration. Cable ties are not included in the scope of delivery.
1.1}>master clock
23:45:59 Su27.03.22

- 15 -
Commissioning
Connect power supply - Switch on master clock
Safety instructions from page 9 observe!
The power supply for the master clock is 100-240 VAC/50-60 Hz, unless otherwise indicated on the name-
plate.
1. Loosen screws of the terminal strip cover and remove cover (see page 11).
2. Disconnect the connecting cable from the mains via the all-pole isolating switch provided by the customer
(see page 9).
3. Slide the operating switch to the "OFF" position (to the left), see figure number.
4. Connect the power supply 100-240 VAC/50-60 Hz to the terminals L, N and PE properly, see figure num-
ber. The protective earth connection is mandatory for safety reasons!
5. Secure the cable against pulling and pushing (see page 14).
6. Re-establish contact via the all-pole disconnector.
7. To switch on the master clock, slide the operating switch to the "ON" position (to the right), see figure
number.
OFF ON

- 16 -
Display test
If the master clock has been switched on (see page 15), the following indications first appear in the display
of the master clock:
This is displayed for approx. 2 seconds.
All dots/pixels must be displayed.
The standard menu with the system time appears.
The time and date displayed after switching on are stored values
and may differ from the current time and date. The system time
may have to be set (menu 1.4 and 1.5) or synchronised (DCF77
radio receiver, GNSS satellite receiver or NTP server) in quartz
operation.


1.1}>master clock
23:45:59 Su27.03.22

- 17 -
Disconnect power supply - Switch off master clock
Safety instructions from page 9 observe!
1. Loosen screws of the terminal strip cover and remove cover (see page 11).
2. Slide the operating switch to the "OFF" position (to the left), see figure number.
3. Disconnect the connecting cable from the mains via the all-pole isolating switch provided by the customer
(see page 9).
4. Disconnect the 100-240 VAC/50-60 Hz power supply at terminals L, N and PE, see Figure digit .
OFF ON

- 18 -
Device fuse
Observe safety instructions from page 9 observe.
The master clock is protected by a fine-wire fuse, 5 x 20mm, 500 mA 250V/sluggish,
see figure digit .

- 19 -
Operation - Menu
The menu is laid out in table form. After switching on the master clock, the menu item appears
"1.1 Master clock", the operator is located in the upper left corner of the menu structure, see the following
table:
Menu structure
The individual menus can be selected in two different ways:
1. direct menu item selection
Press the "menue" key, then the numeric keys "1", "2" etc. for
the desired menu (see table Menu structure).
2. navigation with arrow keys
By pressing the arrow keys ◄▲▼► you can "scroll" through the individual menus hori-
zontally (main menus) and vertically (submenus).
Function keys
The "edit" key confirms entries.
The "menu" key has 2 functions:
•"menu" enables direct menu item selection.
•"menu" cancels an input at any time without saving or changing values.
master clock Lines Channels Messages System Network NTP-client NTP-server
1.1 }>
time date
2.1 }<>
load
3.1 }<>
state
4.1 }<>
quantity
5.1 }<>
system
6.1 }<>
network
7.1 }<>
NTP-Client
8.1 }<>
NTP-Server
1.2 |>
timebase
2.2 |
state
3.2 |<>
switching events
4.2 ^>
messages
5.2 |
change pass code
6.2 |
DHCP
7.2 |
DHCP
8.2 |
state
1.3 |
time zone
2.3 |
line time
3.3 |
delete all
5.3 |
language
6.3 |
IP-address
7.3 |
server
8.3 |
stratum
1.4 |
system time
2.4 |
time zone
3.4 ^
manual
5.4 |
RS232
6.4 |
netmask
7.4 |
multicast rx
8.4 |
multicast tx
1.5 |
system date
2.5 |
mode
5.5 |
line voltage
6.5 |
gateway
7.5 ^
multicast addr.
8.5 |
multicast
1.6 |
display hours
2.6 |
cycle
5.6 |
factory preset
6.6 |
DNS
8.6 ^
intervall
1.7 ^
display date
2.7 |
battery
5.7 ^
update
6.7 ^
MAC addr.
2.8 ^
pulse length

- 20 -
DCF77 radio receiver
The DCF77 radio receiver (art. no. 03.925.111) is available as an accessory.
General
The Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig operates several caesium clocks
(atomic clocks) by which the legal time for the Federal Republic of Germany is represented.
This time is transmitted via the radio station DCF77 near Frankfurt am Main on the frequency 77.5 kHz long
wave. The radio signal has a maximum range of about 2000 km. Both the distance
(field strength) as well as local sources of interference (e.g.: Fluorescent lamps, monitors, TV sets, switching
power supplies or electrical machines) have an influence on the reception quality of the signal.
The time and date are encoded in 59 signals and one signal is sent every second, 1 signal is missing in the
59th second. The duration for the transmission of the entire time and date information is
1 minute.
The DCF77 radio receiver receives the long-wave signal and passes it on decoded to the master clock.